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hw/acpi: add support for i440fx 'snooping' root busses

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If the machine has extra root busses that are snooping to
the i440fx host bridge, we need to add them to
acpi in order to be properly detected by guests.

Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
This commit is contained in:
Marcel Apfelbaum 2015-06-02 14:23:01 +03:00 • committed by Michael S. Tsirkin
parent 09e5b81922
commit a4894206e3
1 changed files with 23 additions and 0 deletions
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23
hw/i386/acpi-build.c
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@ -626,6 +626,7 @@ build_ssdt(GArray *table_data, GArray *linker,
uint32_t nr_mem = machine->ram_slots;
unsigned acpi_cpus = guest_info->apic_id_limit;
Aml *ssdt, *sb_scope, *scope, *pkg, *dev, *method, *crs, *field, *ifctx;
PCIBus *bus = NULL;
int i;
ssdt = init_aml_allocator();
@ -637,6 +638,28 @@ build_ssdt(GArray *table_data, GArray *linker,
/* Reserve space for header */
acpi_data_push(ssdt->buf, sizeof(AcpiTableHeader));
/* Extra PCI root buses are implemented only for i440fx */
bus = find_i440fx();
if (bus) {
QLIST_FOREACH(bus, &bus->child, sibling) {
uint8_t bus_num = pci_bus_num(bus);
/* look only for expander root buses */
if (!pci_bus_is_root(bus)) {
continue;
}
scope = aml_scope("\\_SB");
dev = aml_device("PC%.02X", bus_num);
aml_append(dev,
aml_name_decl("_UID", aml_string("PC%.02X", bus_num)));
aml_append(dev, aml_name_decl("_HID", aml_string("PNP0A03")));
aml_append(dev, aml_name_decl("_BBN", aml_int(bus_num)));
aml_append(scope, dev);
aml_append(ssdt, scope);
}
}
scope = aml_scope("\\_SB.PCI0");
/* build PCI0._CRS */
crs = aml_resource_template();